Resilient washer



Jan. 18, 1944. LE y M, uG 2,339,549

RES ILIENT WASHER Filed March, 6, 19

INVENTOR LEROY M. KUBAUGH A'i'ToRNEYs Patentefl Jan. 13?, E3442 UNITED STATES PATENT 1 OFFICE. 1 2,339,549 I o RESILIENTWASHER I Le Roy MfKubaugh, Akron, Ohio, assignorto The 1 Firestone Tire & Rubber Company, Akron,. I hio,acorporation of Ohio I I' I I Application March 6, 1941, SerialNo. 381,957 I "soiaims. (01. 85-50) I ,I

100% confinedso that the rubber resists relative This invention relates to a-vibration dampening device and more especially it relates tosuch said devices which advantageously may be used to cushion bolts, such as are used to secure together vibrating parts of a structure.

Bolts used to secure sections of trackway rails movement of the disc I4 towards the housing I2, and only a small volume thereof flows from betogether are good examples of bolts'of the aforementioned class. Such bolts are subject tosevereandvaried stresses and repeated vibration, with the result that'they frequently crystallize I and eventually are sheared ofi.

The general object of the invention is to provide a vibration dampening device adapted to carry high compressive 1oads, and at the same time to provide cushioning for vibrating ele- I ments. I Another object of the invention is to provide a substantially totally enclosed rubber body for cushioning bolts from elements secured-together thereby.

The foregoing and other objects will be manifest as the specification proceeds, which specifi-' cation has particular reference to the accompanying drawing, of which:

Fig. I is a bottom plan of a vibration dampening device embodying the invention; and

Fig. II is a diametric section taken on the line 11-11 of Fig. I, and a bolt, shown in, broken lines, in operative association with the device.

Referring in detail to the drawing, a vibration vibration and/or shock attendant sudden change I of .the load applied to the bolt I'I. Note that radially extending corrugations I9 are formed in the surface of the disc I4 adjacent housing I2,

tween the disc and housing, as the rubber body is compressed by tightening the bolt 11. In all events, the rubber body I3 resiliently resists .rnovement of the disc towards the housing I2,

which resiliency absorbsat least a portion of the 1 thereby providing'anincreased area to the surdampening device ll, including a circular metal plate, or cup-shaped housing I2, a rubber body I3, and a metal disc I4, is shown. The housing I2 has a continuous flange I5 extending therefrom in one direction at its periphery and the disc I4 is snugly received in the end thereof to form a substantially totallyenclosed chamber. The rubber body, usually vulcanized, may be made from natural rubber, or from an oil and grease-resistant, rubber-like material, such as neoprene (which is polymerized 2 chloro-l,3 butadiene) The rubber body or washer is initially formed to fit in the chamber formed by the housing I2 and disc ll, beingshown in its normal form in Fig. II. An aperture I6 is formed through the device II and a bolt I! having a head I8 is received therein with the head bearing on the disc Id. In other instances, the nut on the bolt II may bear on the disc but in all events, the bolt extends through the members to be secured together thereby, and draws the members and device II together to form a unit.

face of the disc to'which the rubber is vulcanized, thusincreasing the totaladhesion of the rubber to said disc, while at the same time-the corrugations provide grooves into which the rubber is'molded and thereby locksitself against turning on the surface of the disc thus,prevent-' ing relative movement therebetween. Said corrugations also strengthen the disc 'against'the a xial pull of the bolt [1.

The corrugations increase in depth the farther theyextend from the center of the disc in order to strengthen same in I proportion to the loads applied thereto. The

corrugations should not be diametrically opposed as that decreases the discsresistance to folding on such diameter.

When the device is assembled, as indicated in Fig. II, it absorbs or smooths out the shock and jar of vibrations to which the bolt I1 is subjected by allowing movement of the disc with relation to the housin l2 due to flow of the rubber of the body I3, said rubber flowing between the edges of the disc I4 and the flange I5. Bolts securing rail sections together have been provided with the device of the invention, and have proved very successful inpreventing' bolt fallures. By confining the rubber it can stand the high stresses to which the bolts are subjected.

Ovbiously, the device can be other than circular, as shown herein. Ordinarily the rubber is vulcanized to the metallic means confining same.

The detailed description of the particular embodiment of the invention illustrated and described herein is not to be construed as limiting II the invention thereto. The invention includes all features of patentable novelty residing in the foregoing description and the. accompanying drawing, as determined by the following claims.

What is claimedis: I 1. A shock absorbing washer adapted to engage with and'be compressed by a bolt, said washer comprising an apertured metal plate,

having an endless integral circular flange extending from one surface thereof, an apertured metal disc adapted to fit within said flange, said disc having a plurality of substantially radially directed corrugations extending from one surface thereof in a direction towards said plate when said disc is associated therewith, and an apertured rubber body received between said plate and said disc when said disc isassociated with said plate therebetween; r

2. A vibration dampeningdevice adapted to engage with and be compressed by a bolt, said in order to absorb] vibrations device comprising an apertured metal plate having an endless marginalrfiange extending integrally from one surface, thereof, Jan apertured metal disc disposed within the confines of said,

said rubber body which is adapted to absorb vibrations between said plates.

4. In a device of the character described, the combination with a pair of rigid members, at least one of said members being subjected to vibration inducing stresses, of a vibration dampening'device adapted for disposition intermediate the members for the minimization of the vibratio'n transmission therebetween, said device comprising a cup-shaped housing having a central aperture through which one of said 'members projects in snug fit relation, a resilient body disposed within the housing and adapted to fill the space intermediate thecentral aperture and I :tured disk 7 member and having ribbed portions engaging the flange, said disc being of lesser diameter than n the marginal flange to allowanannula'r channel therebetween, said disk being provided with a plurality of corrugations formed therein which increase in depth with'increased radial length thereof, andan apertured oil-resistant rubber- I tween. r N i @3. In a device of the character described, a

metal plate having an endless flange extending laterally from one side thereof, a second metal plate,v having corrugations formed therein, disposed within the confinesrof and substantially filling the area enclosed'by said flange, and a like body. received between said plate and said disc and adapted to absorb vibrations thereb e-' the outer walls thereof, and a centrally apercarried by said centrally positioned outer wall or the resilient body, said disk being of lesser diameter than the inside diameter of the housing whereby to provide a channel for the flow of the resilient-body during compression thereof by relative movement between the rigid 'members.

5. A vibration dampening resilient washer adaptedto be compressed during use, said resilient washercomprising a cup-shaped housing and a circular plate of lesser diameter than the housing and centrally disposed therein, said a i plate provided rubber, body positioned between said plates and v said flange andohaving only a restricted escapeg ment space therebetween,

aperture extending therethrough forthe reception of a compressing member that draws said metal plates together and causes slight flow of v the device having an depressed inwardly of the housing, a rubber body confined between the inner walls of the housing and the plate, said housing, body and plate being centrally a'pertured for reception of a compression memberhaving a portion abutting said plate for clampingly maintaining the device compressed between the members.

LE ROY M. KUBAUGH.

with radially disposed "portions- 

